Garmin Complete Guide to Audio Configuration and Maintenance for 240/3.6
Page 24

2. Plug in headsets at each ICS position.

NOTE

For helicopter operation using a two-stage Intercom/PTT switch, prior to using the keyed-intercom mode, the VOX level should be set by adjusting the VOX knob while the first detent is actuated and held.

3.Check Pilot and Copilot ICS positions for isolation and proper operation of volume and squelch controls.

3.5.5Aircraft Receivers Check

1.Select the audio source corresponding to each installed avionics unit and check for audio over the headsets.

3.5.6Music System Check

1.Set the intercom to the ALL mode [Pilot ISO LED off.]

2.Connect a stereo audio source to MUSIC 1 (ensure the front panel jack is empty and the music volume knob is not set to minimum). Verify that stereo audio is heard over all headset positions when MUSIC 1 is selected as the music source and MUSIC LED is on. Pull out on the right side small knob and verify that music volume adjustment is working properly.

3.Select an audio source to COM 1 and verify that the sound is muted by active COM 1 audio when RADIO music mute is selected and by intercom audio when ICS music mute is selected.

4.Connect a stereo music source to MUSIC 2. Verify that stereo audio is heard when MUSIC 2 is selected as the music source and MUSIC LED is on.

5.Connect a stereo audio source to the front panel jack. Verify that stereo audio is heard when MUSIC 1 is selected as the music source and MUSIC LED is on.

CAUTION

Be sure to check all aircraft control movements before flight is attempted to ensure that the wiring harness does not touch any moving part.

This completes the in-aircraft post installation checkout. Perform a flight test after installing the unit to ensure satisfactory performance of the audio functions.

3.6CONFIGURATION ADJUSTMENTS

Adjustment to the Volume and Squelch settings can be made to the GMA 240 through access holes in the unit’s top cover. Refer to Section 2.3 for details.

3.7CONTINUED AIRWORTHINESS

Maintenance of the GMA 240 is “on condition” only. Refer to the GMA 240 Maintenance Manual (Garmin P/N 190-00917-02) as needed. Periodic maintenance of the GMA 240 is not required. Instructions for Continued Airworthiness (ICA) are not required for this product under 14 CFR Part 21 since the GMA 240 has received no FAA approval or endorsement.

Page 3-4

GMA 240 Installation Manual

Rev. A

190-00917-01

Page 23 Page 25
Image 24
Page 23 Page 25
Contents GMA Record of Revisions DescriptionInformation Subject to Export Control Laws Section RangeThis page intentionally left blank Table of Contents Appendix a Outline and Installation Drawings List of Illustrations GMA 240 Hardware MOD Level History Introduction Equipment DescriptionTechnical Specifications Characteristic SpecificationFeatures Summary Physical CharacteristicsElectrical Characteristics Power Requirements Reference DocumentsPart Number Document Limited Warranty Blank Installation Materials GMA 240 Wiring, Configuration, and Adjustment OptionsGarmin P/N Equipment AvailableComponent Name Default Description Internal Configuration JumpersVOLUME/MUTE Configuration Adjustments MusicAccess Hole Location Top View Hardwire Configuration OptionNoise GMA 240 Mounting GMA 340 Unit RackUnpacking Unit Electrical ConnectionsPositioner GMA 240 Installation Audio Shield TerminationPost Installation Checkout Lamp TestFailsafe Operation Check Transceiver Operational CheckAircraft Receivers Check Music System CheckConnector Description Pin List1 P2401 Connector J2401 Pin Assignments Pin Name 2 J2402 Connector J2402 Pin Assignments Pin Name Aircraft Power and Lighting 3 P2403 Connector front panel 2.5 mm mini-jackAircraft Power Pin Connector Pin NameConfiguration Pins External Configuration PinsPin Connector Pin Name Description Intercom Key Inputs if configured COM Audio and Mic Keys Pin Connector Pin Name DescriptionAudio Inputs/Outputs and Mic Keys Alert Audio I/O Pin Connector Pin Name Description AUX and NAV Audio Inputs Pin Connector Pin Name DescriptionFailsafe Warning Audio Pin Pin Name DescriptionTel Audio I/O Pin Connector Pin Name Description Headset Outputs Pin Connector Pin Name DescriptionCOM Swap Pin Connector Pin Name Description Appendix a Outline and Installation Drawings Figure A-2. GMA 240 Connector/Rack Assembly Drawing Figure A-3. GMA 240 Recommended Panel Cutout Dimensions Appendix B Interconnect Drawings Figure B-1. GMA 240 Interconnect Drawing page 2 Figure B-1. GMA 240 Interconnect Drawing page 3 GMA240 J2401 Top of Main Board Bottom of Main Board

GMA 240 specifications

The Garmin GMA 240 is a state-of-the-art audio panel designed specifically for aviation applications. This device is known for its advanced features, user-friendly interface, and superior sound quality, making it a popular choice among pilots and aircraft owners. One of the standout characteristics of the GMA 240 is its ability to integrate seamlessly with a variety of communication and navigation systems, enhancing situational awareness and streamlining cockpit operations.

One of the main features of the GMA 240 is its capability to manage multiple audio inputs. The panel provides independent volume controls for the pilot and co-pilot, allowing each to adjust their audio levels according to their preferences. Additionally, the GMA 240 offers a dedicated input for auxiliary devices, such as smartphones or tablet computers, facilitating music playback or calls during flight.

The GMA 240 also incorporates advanced noise reduction technology. This feature minimizes ambient noise interference, ensuring that communication between the crew and air traffic control is crystal clear. The panel is equipped with a digital processing function that enhances audio clarity and reduces background noise, a critical asset in the typically noisy environment of an aircraft cockpit.

Another noteworthy characteristic of the GMA 240 is its intuitive operation. The layout of the controls is logical and straightforward, allowing pilots to adjust settings quickly and efficiently without distraction. This ease of use is crucial, especially during high-pressure situations when pilots need to maintain focus on flying while managing audio communications.

The GMA 240 supports a wide range of aircraft configurations, making it a versatile choice for various aviation needs. It is designed to be compatible with both general aviation and commercial aircraft, further extending its usability in different environments. The panel meets rigorous safety standards, ensuring it can withstand the demands of aviation use.

In terms of installation, the GMA 240 is engineered for easy integration into existing cockpits, requiring minimal modifications. Its compact design and robust build quality ensure durability even in challenging flight conditions.

In summary, the Garmin GMA 240 audio panel stands out for its combination of advanced features, user-friendly design, and high-quality performance. With its excellent noise reduction capabilities, independent audio controls for each crew member, and broad compatibility, it is an essential tool for enhancing communication and safety in the cockpit. This audio panel continues to be a preferred choice for aviation professionals seeking reliability and efficiency.
Top Page Image Contents